Atrophic gastritis group (n = 29)

Control group (n = 29)

P

Chao1 (mean ± SD)

346.05 ± 41.32

357.42 ± 49.29

0.387

ACE (mean ± SD)

347.30 ± 42.49

360.19 ± 46.52

0.233

Shannon (mean ± SD)

3.47 ± 0.22

3.45 ± 0.17

0.477

Simpson (mean ± SD)

0.06 ± 0.02

0.06 ± 0.01

0.951